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diff --git a/runtime/nterp_helpers.h b/runtime/nterp_helpers.h
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+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ART_RUNTIME_NTERP_HELPERS_H_
+#define ART_RUNTIME_NTERP_HELPERS_H_
+
+#include "quick/quick_method_frame_info.h"
+
+namespace art {
+
+class ArtMethod;
+
+/**
+ * Returns the QuickMethodFrameInfo of the given frame corresponding to the
+ * given method.
+ */
+QuickMethodFrameInfo NterpFrameInfo(ArtMethod** frame)
+    REQUIRES_SHARED(Locks::mutator_lock_);
+
+/**
+ * Returns the dex PC at which the given nterp frame is executing.
+ */
+uint32_t NterpGetDexPC(ArtMethod** frame)
+    REQUIRES_SHARED(Locks::mutator_lock_);
+
+/**
+ * Returns the reference array to be used by the GC to visit references in an
+ * nterp frame.
+ */
+uintptr_t NterpGetReferenceArray(ArtMethod** frame)
+      REQUIRES_SHARED(Locks::mutator_lock_);
+
+/**
+ * Returns the dex register array to be used by the GC to update references in
+ * an nterp frame.
+ */
+uintptr_t NterpGetRegistersArray(ArtMethod** frame)
+      REQUIRES_SHARED(Locks::mutator_lock_);
+
+/**
+ * Returns the nterp landing pad for catching an exception.
+ */
+uintptr_t NterpGetCatchHandler();
+
+/**
+ * Returns the value of dex register number `vreg` in the given frame.
+ */
+uint32_t NterpGetVReg(ArtMethod** frame, uint16_t vreg)
+    REQUIRES_SHARED(Locks::mutator_lock_);
+
+}  // namespace art
+
+#endif  // ART_RUNTIME_NTERP_HELPERS_H_